Gill, 19 Jul 2013My sim card nt work in this mobile always show mmi code invild help me qicklyThis problem occur due to network congestion or error. Kindly switch off the mobile and disassemble the sim card from your mobile. wait for 2 to 3 hrs and then re-insert the sim card in your mobile, and after this you "switch-On" the mobile.

My Hands on Experience is that its a wonderful mobile when it works. My Karbonn A21 Keeps on Restarting by itself whenever i open any app, games download or browse the Web for 30 mins. I've given it to service center twice for rectification and first time they returned it to me after a month and the problem was still the same and second time i gave it to them within a weeks time and again after a month they gave it back to me and still the same problem. Karbonn Support no 18001024660 will ring but very rarely a person will answer your call and they will give chennai no stating call your chennai customer care. At chennai they will say if you want to escalate call up 18001024460 and they will keep on bouncing here and there.
MY Strong Opinion PLEASE DON'T BUY KARBONN MOBILES!!! I'VE DECIDED TO APPROACH THE CONSUMER COURT REGARDING THIS.

sachin shinde, 02 Jul 2013I am using this phone since 6 months....facing a lots of issues like below.
* Battery:- get... moresachin, I am also facing the same problems... do u get any solution for this.. please inform me if there any. at kolekarnitin@gmail.com

I purchased this handset one month back , no issues before I inserted my 16 GB memory card into it, my display once in a day flickers like some virus has come into it or somtng looks like its just gonna b dead ...wat may b the problem guys? aid me guys ...please its a request...

ya when I open any app while the phone is flickering or blinking , it becomes OK...
sorry for my wrong English